/*
 * Copyright 2023 devaper
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.github.devaper.pigeon.support.component

import com.ning.http.client.*
import io.github.devaper.pigeon.component.*
import io.github.devaper.pigeon.exception.*
import io.github.devaper.pigeon.request.*
import io.github.devaper.pigeon.response.*

/**
 * [Grizzly](https://github.com/eclipse-ee4j/grizzly-ahc)异步Http客户端
 */
class GrizzlyHttpClientEngine(
    private val httpClient: AsyncHttpClient = AsyncHttpClient()
) : HttpClientEngine {

    override fun execute(requestTemplate: RequestTemplate, callback: HttpClientCallback) {
        val requestBuilder = RequestBuilder()
            .setMethod(requestTemplate.requestMethod)
            .setUrl(requestTemplate.requestUrl)

        requestTemplate.requestParameterEntries.forEach { (name, values) ->
            values.forEach { requestBuilder.addQueryParam(name, it) }
        }

        requestTemplate.requestHeaderEntries.forEach { (name, values) ->
            values.forEach { requestBuilder.addHeader(name, it) }
        }

        if (requestTemplate.requestBody != null) {
            requestBuilder.setBody(requestTemplate.requestBody)
        }

        httpClient.prepareRequest(requestBuilder.build()).execute(object : AsyncCompletionHandler<Unit>() {
            override fun onCompleted(response: Response) {
                try {
                    if (response.statusCode != 200)  {
                        throw ResponseException(
                            url = response.uri.toString(),
                            statusCode = response.statusCode,
                            statusText = response.statusText
                        )
                    }
                    val responseTemplate = ResponseTemplate(
                        status = response.statusCode,
                        statusText = response.statusText,
                        contentType = response.contentType,
                        redirected = response.isRedirected,
                        bodyBytes = response.responseBodyAsBytes
                    )
                    callback.success(responseTemplate)
                } catch (e: Throwable) {
                    callback.failure(e)
                }
            }

            override fun onThrowable(t: Throwable) {
                callback.failure(HttpRequestFailureException(t))
            }
        })

    }
}